Calculator -- time, gcd, lcm
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※ To use this calculator, first you should know :
Entering a time (such as 07:08:09 + 5 hours) to enter an input to the following sequence.
07:08:09 To enter , type the following:
1. Number  to [h] input
2. Number  to [m] input
3. Number  to [s] input
4. input to [+] add button
5. Number  to [h] input
6. input to [=] equal button
The result will display 12h 8m 9s on screen.
You can press [Convert] button to convert another time style.
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